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Test Code Ab Screen Antibody Screen - Blood Bank

Clinical System Name

Blood Antibody Screen PSBC


Antibody Screen
Coombs, Indirect
Indirect Antibody Test
Indirect Antiglobulin Test
Indirect Coombs

Antibody Screen Bloodworks Northwest

Sample Requirements

Specimen: Whole Blood

Container(s): Lavender/EDTA

Preferred Vol: 2 mL

Infants <12 months:  Minimum 2-3 microtainers each with 0.5 mL

Difficult Draw:  Minimum 2 microtainers each with 0.5 mL 


Note:  Samples with extremely low volumes may preclude full ABO typing and may require re-draw if blood product transfusion is required.


Note: A provider places an order in CIS. Complete a BWNW Request for Testing requisition. Check "Indirect Antiglobulin Test (antibody screen) on the requisition.  Label on specimen and requisition must include: Patient name (as registered), medical record number, and date/time drawn. Information on the label and requisition must match the patient's arm band exactly. Perform a 2-person verification at the bedside; both individuals must sign the requisition, and phlebotomist's initials must be on the tube. Deliver specimen and requisition to the Lab.

Processing Instructions

Reject due to:




Storage location: "Indirect Antiglobulin Test (antibody screen)" should be checked on the BWNW Request for Testing requisition. Check information on label and requisition for accuracy. Deliver labels, specimen and requisition to the blood bank.


Off-site collection:


Specimen Type Temperature Time
Whole blood Room temp  



STAT Performed TAT
Y Daily  4 h


Performing Laboratory

Bloodworks Northwest @ Seattle Children's 


Department:  Bloodworks Northwest @ Seattle Children's


Phone Number:  (206) 987-5151



Reference Range

None specified


Method: None specified

Analytical Volume: None specified


Send Out Instructions


Reference Test Name: Indirect Antiglobulin Test (Antibody Screen)
Reference Test Number: 3104-00
Instructions: .